test(bdk): add anyhow dev-dependency

Author: notmandatory

crates/bdk/Cargo.toml

@@ -47,6 +47,7 @@ dev-getrandom-wasm = ["getrandom/js"]
 lazy_static = "1.4"
 env_logger = "0.7"
 assert_matches = "1.5.0"
+anyhow = "1"
 
 [package.metadata.docs.rs]
 all-features = true